Attachment for bobbin-winding machines



Nov. 12, 19529. .1. D. JOYCE 1,735,349 ATTACHMENT FOR BOBBIN WINDINGMACHINES File d'Nov. l, 1928 JHM 0 t/arc Patented Nov. 12, 1929 UNITEDSTATES PATENT A'rmonmmvtr FOR BOBBIN-WINDING MACHINES Application filediTovcmber This invention relates to bobbin winding machines, and has forits object toprovide' improvements in the bobbin positioning "andretaining means. I I Q The bobbins employed in connection with the classof machines to which this invention ielates'are constructed of a. pulpcomposition somewhat similar if notthe same material as is commonlydefined as Fpape'r pulp board. \In the continued winding and unwindingof these pulp composition bobbins, the retain, ing caps heretoforeapplied to the upper end thereof tears and roughens the said end so asto in time render the bobbins unfit for use. p This invention consistsin the construction of a bobbin retainin cap which protects the up" e'rend of the bo%bin against the tearing an roughening action, so that thelife and usefulness of the bobbin is prolonged indefinitely and itsefficiency preserved, as well as the elimination or the breaking orfraying of the yarn or thread in 'unwindingtherefi bin, I j I fReferring .to the accompanying drawing; Fig-are 1 is a reducedfragmentary and diagraminatic view ill'nstrating a winding bobbin, inoperative position, v

Figure 2 is an enlarged vertical sectional view through the bobbin andits retaining cap, and p V I I s Figure 3 is a view in perspective ofthe several parts of the retaining cap their j relative positions beforeassembly, and also illustrating them in association with the up; per endare bobbin to which the "cap is to be applied.

Like numerals of reference indicate the same parts throughout theseveral figures, in

the bobbin having the flared 1, '19'28. Serial No. 316,605.

moment due to the direction of rotation 01'' the bobbin which momentwould tend to unthread or loosen the cap if a right-hand thread wasemployed. L I Referring particularly to the cap '8, it will be seen fromFigure 3 that the same comprises a flange 9 having central opening 10defined by a fiat body portion 11 which merges into a gradually anddownwardly curved outer portion 12. It will be noted tliat the upperend13 of the bobbin 1 is curved substantially complementa'lly to thecurvature of the flange 9, as shown in Figure 2, so that the said flange9 functions to exactly center the upper end "of the bobbin 1 as showninfthed'rawings. i

The knob portion 14 of the cap 8 is prefer ably formed of a materialsuch as bakelite and includes a cylindrical knurled portion 15, aflanged portion 16 and a short depending cylindrical portion 17. A hole18 (Figure 2) is centrallyprovi'ded in the structure, and a threadedbushing 19 is pressed into said hole so that the end of the bushing isflush with the end of the depending oylindrical portion 17 as shown inFigure 3.

The cap also includes a collar QOhaving a short upstanding annularflange 21 of smalle'r diameter than the hole 10 in the flange 9, theheight of saidflange 21 being slightly in excess of the thickness of thelarge metal flange 9, while the hole or bore22 of the collar pressed onthe said de 'iending cylindrical portion 17'un' ti'l the shortupstanding annular flange 21 passes through the said hole 10 in themetal flange 9 and bottoms against the flange portion 16fof the knob 14.This prevents the collar 20 from clamping the metal flange between thecollar 20 and the flange is threaded on the end ot the stem 6.

portion 16 of the knob 14, and permits free rotation of the knob 1e andits collar 20 with respect to the metal flange 9, but at the same timeretains the metal flange 9 permanently in the assembly as will be seenfrom an inspection of Figure 2.

Having thus fully described the invention its operation is as follows:

The bobbin 1 being positioned on its support 5 as shown in Figure 2,the" cap 8 As soon as the metal flange 9 progresses downwardly andengages the end 13 of the bobbin it centers the said bobbin, and throughfrictional engagement between the curved portion 12 of the said flange9, and the curved end 13 of the bobbin, rotation of the said flange i onand against the end 13 or the bobbin is stopped, while the knob i i ofthe cap continues to be threaded down on the st m 6 until the saidflange 9 tightly clamps the bobbin in proper operative position as shownin Figure 2.

7 By reason of this construction all rotation of the metal flange 9 onand upon the end 13 ot the bobbin 1 is prevented, while a tight clampingaction between the metal flange 9 and the end 13 of the bobbin isinsured.

The result is that all tearing, scratching and roughening action on theend 13 of the bobbin is entirely absent and eliminated by the use ctthis construction, and the lite'and eficiency of the bobbin is therebyindefinitely prolonged.

llfhile I have shown and described what I conceive to be a preferredembodiment of the invention, 1 do not wishto be limited to the enactconstruction disclosed, but I consider myself clearly entitled to allsuch changes and modifications as fall within the li lit and scope ofthe appended claims.

What I claim new and desire to secure by Letters Patent of the UnitedStates is: l. A cap for centering and retaining a winding bobbinincluding a centrally bored knob portion which comprises a flange and adepending cylindrical portion, a threaded lmshing within the bore of theknob portion, a metal flange having a central hole, a flat centralportion and a downwardly curved outer por ion, and a collar whichincludes an upstanding cylindrical flange of smaller diameter than thehole in said metal flange, the said upstanding cylindrical flange beingof greater depth than the thickness of the said metal flange, the saidcollar being poitioned on the said dependin cylindrical portion oi theknob portion with the said metal flange therebetween, the saidupstanding cylindrical flange on tile said collar passing through thehole in the said metal flange and the bottoming against the flange otthe knob portion to retain the metal flange without binding the same andto permit tree (-ollar being disposed between the said flange oi theknob and the said collar, the device including means to prevent bindingthe metal flange by the said collar and to permit tree rotation of thesaid lmob with respect to the said metal flange. A retaining andcentering cap for windeads therein ana including a flange and adepending cylindrical portion, a collar for the cylndrical portion, abobbin engaging flange interposed between the flange on the knob and thesaid collar and rotatable relt vely to the said knob, the deviceincluding mean for preventing the collar from binding a 'ainstthe saidbobbin engaging flange.

t. A retaining and centering cap for windh mg bo bins includlng athreaded knob having a flange and a depending cylindrical portion, acollar for the cylindrical portlon and a bobbin engaging flangeinterposed between the flange on the knob and the said j bobbinsincluding a bored knob having collar and rotatable relatively to thesaid :3

knob. I

5. A retaining and centering cap for winding bobbins including athreaded knob having a depending cylindrical portion, a collar binengaging flange interposed between the said knob and the said collar androtatable relatively to the said knob.

6. A retaining and centering cap "for winding ing a dependingcylindrical portion, a bobbin engaging flange under the said knob androtatable relatively thereto, and means for retaining the said bobbinengaging flange j on the said knob.

1. A. retaining and centering cap for winding bobbins including a.threaded knob and a bobbin engaging flange and means for rotat-ablysecuring the said bobbin engaging flange on the said knob.

In testimony whereot I afllx my signature.

JAMES DANIEL JOYCE.

for the cylindrical portion, and a bobbobbins including a threaded knobhav-

